Fastener.



C. JOSEPH.

FASTENER.

APPLIoATlon FILED 00123, 1910.

1,051,893, Patented Fb.4,1913.

CARL JOSEPH, OF BAYONNE, NEW JERSEY.

FASTEN ER.

Specification of Letters Patent.

Application filed October 3, 1910. Serial No. 585,092.

-T o all 'wh-0m t may concern Be it known that I, CARL JOSEPH; a citizen of the United States, residing at Bayonne, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Fasteners, of which the following is a specification.

This invention relates to fasteners and its novelty consists in the construction and adaptation of the parts as will be more fully hereinafter pointed out.

The object of the invent-ion is to produce an efficient fastener by the use of which objects may be securely held against surfaces inaccessible from the rear, one requiring a minimum. sized aperture for the insertion of the fastener and a minimum amount of material for its manufacture and one which -may, if desired, be withffirawn after use.

So far as known to me the usual fastener of the Class to which my invention relates comprises a single main bar, to which is hinged or otherwisesecured a toggle bar adapted to fall by gravity into the space back of the Wall into which it is designed to be inserted. The .main bars are usually threaded to receive nuts and the toggle bars are either hinged directly to such bars or to an intermediate member secured thereto. In eithercase the aperture in the walll required for the insertion of the fastener is much greater in Width than the diameter of the main bar and once having been inserted there is no Way of withdrawing the fastener from the Wall.

ln the drawings, Figure 1 is a top plan view of a fastener' embodying my invention, and a vertical section through a wall into which it is to be inserted. ,Fig. 2 is a side elevation of the fastener inserted in the wall showing the `toggle bar partly rotated to position. Fig. 3 is a view similar to that shown in F ig. 2shewing the toggle bar completely rotated to position and an object secured againstltlie wall. Fig. 4 is a view similar to F ig. 2 showing the toggle bar partly rotated to withdraw the same from position. Fig. 5 is an edge view of the device, part of the same being broken through to show a concealed part. Fig. tl is an enlarged section on the plane of the line G--tiin Fig. 5. Fig. 7 is a section of one of the members of the main bar, and Fig. 8 is a perspective of the sundry parts nonasseinbled.

le the drawings 1G is a wall of which 11 of two longitudinal members 20 and 21 and a toggle bar 22 of the same Width and cross sectional area substantially as one of the members 20, and secured to the other member 21 of the main bar by a transverse pivot 23. A cord, Wire, or other fi-lamentary conneotion 24 serves to join the bar 22 Vand member20. Each of the members 20 and 21 are preferably made substantially alike and each consist of. a substantially semicylindrical bar having one plane side 200, two substantially smooth lateral surfaces 201 and 202 and a rounded upper surface traversed by a series of oblique indentations 203V Patented Feb. 4, 1913.

resembling in general outline the threads of a screw. They arer not true screw threads because it is continuous pieces or any desired length but they approximate suliicientlyto such threads in shape to engage with the internal threads of a nut-30 of suitable size, so that When the two members 20 and 21 are assembled as shown in Figs. 3 and 5, a hutwill readily engage both of t-hem to hold them firmly together. So far as I am aware it is practieally impossible to roll screw threads on rods of the nature required for the purpose stated. These rods with one plane surface and transverse oblique indentat-ions on the opposite side are practical, readily made and serve the purpose just as well as a perfectly formed half`screvv would do.

In using the device, the parts are assembled as shown inFig. 1, the two plane 'surfaces of the members 20 and 21 being in contact. Also if it is subsequently desired towithdraw the fastener, the connect-ion 24 is secured to the toggle bar 22 and the member 20. The parts being assembled the bar 22 and the members 20 and 2l are inserted through the' aperture 13 until the operator is reasonably certain that the inner end of the bar 22 has cleared the inner side 12 of the wall l0. The member 21 and bar 22 hinged to it may be inserted and bar 22 hinged to it may be inserted without the member 20 but it is easier to manipulate them all together. After the parts have reached the positions stated the bar 22 is allowed to fall by gravity into the position designed to roll these bars in shown in Fig. 3 or it is positively moved into such position by pushing forward the member 20 against it. If no connection 24 is used and gravity is to be depended upon,

.is placed over the assembled members 20 and 21 and against the article as a bracket 40 designed lto be secured against the wall l0.

When it is desired to withdraw the fastener, the nut 30 is first removed, then the member 20 is withdrawn gently from the aperture and the connection 24 pulling on the bar 22 causes the latter to be rotated on its pivot 23 and brings it in alinement with the member 20, when the entire device can then readily be withdrawn through the aperture 13.

The parts of the device are very cheap to make. They are readily assembled, inserted and removed from a wall. They may be used over-and over again and theyI require in their use an aperture no wider than the combined width of the two members of the main bar.

What I claim as new is j -1. A fastener, comprising a pair of separate semi-cylindrical rods longitudinally slidable upon each other, one of said rods terminating short of one end of the other, a toggle bar pivoted on the `inner face of the projecting end of the other rod and capable of swinging into and out of alinement with the first rod, and means for securing the tWo rods together and against relative 'longitudinal sliding movement.

2. A fastener, comprising a pair of separate semi-'cylindrical rods longitudinally slidable upon each other, one of said rods terminating short of one end of the other, a toggle bar pivoted on the inner face of the projecting end of the other rod and capable of swinging into and out of alinement with the first rod, a connection between the said first rod and toggle bar for effecting the swinging movement of the latter on the longitudinal movement of the former, and means for securing the two rods together and against relative longitudinal sliding movement.

3. A fastener, comprisinga pair of separate semi-cylindrical. rods 'longitudinally slidable upon each other, one of said rods terminating short ofone end of the other, a

'toggle bar pivoted on the inner face of the projecting end of the other rod and capable of swinging into and out of alinement with the first rod, said rods having their outer faces provided with diagonal indentations forming screw threads, and a nut detachably threaded on the rods for securing the two rods together and against relative longitudinal sliding movement.

4. A new article of manufacture, consisting of a substantially semi-cylindrical rod having oblique indentations on the central portion of its 'curved face, said indentations terminating short of the side edges of. the rod.

5. A new article of manufacture, consisting of a substantially semi-cylindrical rod having smooth lateral'margins and oblique indentations in its curved face, said indentations being gradually reduced in depth soY and terminating at the said smooth lateral y margins.

In testimony whereof I haveaixed my signature in presence of two witnesses.

CARL JOSEPH. Witnesses:

ALAN C. McDoNNnLL, E. -W. SCHERR, J r. 

